def test_cccd_not_shared_between_clients(central, peripheral, dual_role):
"""Client configuration descriptor values should not be shared across several clients"""
cccd_uuid = 0x2902
# CCCD is in the characteristic, there is no need to redeclare it, instantiate another random descriptor
instantiate_descriptor(dual_role, 0xDEAD, "FEED")
central_handle, dual_handle_as_peripheral = gap_connect(central, dual_role)
dual_handle_as_central, peripheral_handle = gap_connect(dual_role, peripheral)
services = discover_user_services(central, central_handle)
characteristic = services[0]["characteristics"][0]
# discover this descriptor
descriptors = discover_descriptors(
central,
central_handle,
characteristic["start_handle"],
characteristic["end_handle"]
)
for descriptor in descriptors:
if descriptor["UUID"] == cccd_uuid:
descriptor_handle = descriptor["handle"]
break
def verify_cccds(expected_value_client_0, expected_value_client_1):
verify_client_descriptor_value(central, central_handle, descriptor_handle, expected_value_client_0)
assert expected_value_client_0 == dual_role.gattServer.read(descriptor_handle, dual_handle_as_peripheral).result
verify_client_descriptor_value(peripheral, peripheral_handle, descriptor_handle, expected_value_client_1)
assert expected_value_client_1 == dual_role.gattServer.read(descriptor_handle, dual_handle_as_central).result
def write_value(client, handle, new_value):
client.gattClient.writeCharacteristicDescriptor(handle, descriptor_handle, new_value)
# at the beginning, CCCD should be equal to 0000
verify_cccds("0000", "0000")
# enable notifications for client 0 (note, send in little endian)
write_value(central, central_handle, "0100")
verify_cccds("0100", "0000")
# enable indications for client 1 (note, send in little endian)
write_value(peripheral, peripheral_handle, "0200")
verify_cccds("0100", "0200")
# disable notifications for client 0 (note, send in little endian)
write_value(central, central_handle, "0000")
verify_cccds("0000", "0200")
# enable notification for client 1 (note, send in little endian)
write_value(peripheral, peripheral_handle, "0100")
verify_cccds("0000", "0100")
def test_characteristic_has_cccd(central, peripheral, char_property,
descriptor):
log.info(
'Testing characteristic with a property {} and {} has a CCCD available'
.format(char_property[0], descriptor[0]))
properties = char_property[1]
descriptors = descriptor[1]
services_uuids = [0xBEAF, make_uuid()]
characteristics = [0xDEAD, make_uuid()]
declared_services = []
# declare services and commit them
for uuid in services_uuids:
peripheral.gattServer.declareService(uuid)
for characteristic in characteristics:
peripheral.gattServer.declareCharacteristic(characteristic)
peripheral.gattServer.setCharacteristicProperties(*properties)
for descriptor in descriptors:
peripheral.gattServer.declareDescriptor(descriptor)
declared_service = peripheral.gattServer.commitService().result
# assert that characteristics UUID match and that services UUID match
assert_uuid_equals(uuid, declared_service["UUID"])
assert len(characteristics) == len(declared_service["characteristics"])
for i in range(len(characteristics)):
characteristic = characteristics[i]
declared_characteristic = declared_service["characteristics"][i]
assert_uuid_equals(characteristic, declared_characteristic["UUID"])
declared_descriptors = declared_characteristic["descriptors"]
for j in range(len(descriptors)):
assert_uuid_equals(descriptors[j],
declared_descriptors[j]["UUID"])
declared_services.append(declared_service)
# connect central and peripheral and discover user services
central_connection_handle, _ = gap_connect(central, peripheral)
discovered_services = discover_user_services(central,
central_connection_handle)
# the number of services discovered should be equal to the number of services registered
assert len(services_uuids) == len(discovered_services)
# services discovery should return services in declaration order
for i in range(len(services_uuids)):
declared_service = declared_services[i]
discovered_service = discovered_services[i]
assert_uuid_equals(declared_service["UUID"],
discovered_service["UUID"])
assert declared_service["handle"] == discovered_service["start_handle"]
# discovery process should report the same characteristics as the ones registered
assert len(declared_service["characteristics"]) == len(
discovered_service["characteristics"])
for j in range(len(declared_service["characteristics"])):
declared_characteristic = declared_service["characteristics"][j]
discovered_characteristic = discovered_service["characteristics"][
j]
assert declared_characteristic[
"value_handle"] == discovered_characteristic["value_handle"]
assert_uuid_equals(declared_characteristic["UUID"],
discovered_characteristic["UUID"])
# discover descriptors and compare against what has been registered
discovered_descriptors = discover_descriptors(
central, central_connection_handle,
discovered_characteristic["start_handle"],
discovered_characteristic["end_handle"])
# find the CCCD
cccd = [x for x in discovered_descriptors if x["UUID"] == 0x2902]
assert 1 == len(cccd)
discovered_descriptors.remove(cccd[0])
# notify/indicate descriptor is implicit
assert len(declared_characteristic["descriptors"]) == len(
discovered_descriptors)
for k in range(len(declared_characteristic["descriptors"])):
declared_descriptor = declared_characteristic["descriptors"][k]
discovered_descriptor = discovered_descriptors[k]
assert_uuid_equals(declared_descriptor["UUID"],
discovered_descriptor["UUID"])
assert declared_descriptor["handle"] == discovered_descriptor[
"handle"]
def test_allow_characteristic(central, peripheral, characteristic, descriptor):
log.info('Testing {} with {} is allowed'.format(characteristic[0],
descriptor[0]))
characteristics = [{
"uuid": characteristic[1],
"descriptors_uuid": descriptor[1]
}]
services_uuids = [0xBEAF, make_uuid()]
declared_services = []
# declare services and commit them
for uuid in services_uuids:
peripheral.gattServer.declareService(uuid)
for characteristic in characteristics:
peripheral.gattServer.declareCharacteristic(characteristic["uuid"])
for descriptor_uuid in characteristic["descriptors_uuid"]:
peripheral.gattServer.declareDescriptor(descriptor_uuid)
declared_service = peripheral.gattServer.commitService().result
# assert that characteristics UUID match and that services UUID match
assert_uuid_equals(uuid, declared_service["UUID"])
assert len(characteristics) == len(declared_service["characteristics"])
for i in range(len(characteristics)):
characteristic = characteristics[i]
declared_characteristic = declared_service["characteristics"][i]
assert_uuid_equals(characteristic["uuid"],
declared_characteristic["UUID"])
descriptors_uuid = characteristic["descriptors_uuid"]
declared_descriptors = declared_characteristic["descriptors"]
for j in range(len(descriptors_uuid)):
assert_uuid_equals(descriptors_uuid[j],
declared_descriptors[j]["UUID"])
declared_services.append(declared_service)
# connect central and peripheral and discover user services
central_connection_handle, _ = gap_connect(central, peripheral)
discovered_services = discover_user_services(central,
central_connection_handle)
# the number of services discovered should be equal to the number of services registered
assert len(services_uuids) == len(discovered_services)
# services discovery should return services in declaration order
for i in range(len(services_uuids)):
declared_service = declared_services[i]
discovered_service = discovered_services[i]
assert_uuid_equals(declared_service["UUID"],
discovered_service["UUID"])
assert declared_service["handle"] == discovered_service["start_handle"]
# discovery process should report the same characteristics as the ones registered
assert len(declared_service["characteristics"]) == len(
discovered_service["characteristics"])
for j in range(len(declared_service["characteristics"])):
declared_characteristic = declared_service["characteristics"][j]
discovered_characteristic = discovered_service["characteristics"][
j]
assert declared_characteristic[
"value_handle"] == discovered_characteristic["value_handle"]
assert_uuid_equals(declared_characteristic["UUID"],
discovered_characteristic["UUID"])
# discover descriptors and compare against what has been registered
discovered_descriptors = discover_descriptors(
central, central_connection_handle,
discovered_characteristic["start_handle"],
discovered_characteristic["end_handle"])
assert len(declared_characteristic["descriptors"]) == len(
discovered_descriptors)
for k in range(len(declared_characteristic["descriptors"])):
declared_descriptor = declared_characteristic["descriptors"][k]
discovered_descriptor = discovered_descriptors[k]
assert_uuid_equals(declared_descriptor["UUID"],
discovered_descriptor["UUID"])
assert declared_descriptor["handle"] == discovered_descriptor[
"handle"]